Flora of North America species comparison

long-creeping, 1.5–3 mm diam.

short-creeping to suberect, 5–8 mm diam.

monomorphic, dying back in winter, often 1 cm or more apart, fertile leaves often somewhat longer than sterile leaves, 25–80 cm.

monomorphic, evergreen, clustered, 20–55(–80) cm.

straw-colored above base, 12–45 cm × 1–3 mm, at base sparsely set with tan, ovate, glabrous scales.

straw-colored, 5–18(–25) cm × 1–3 mm, at base with brown, lanceolate, stellate-hairy scales.

lanceolate, 14–35 cm, proximal pinnae largest, or lowest pair slightly smaller, blade tapered gradually to pinnatifid apex.

15–40(–55) × 5–10 cm, proximal 2–5(–10) pairs of pinnae gradually reduced, blade gradually narrowed distally to a pinnatifid apex.

deeply pinnatifid to ca. 1 mm from costa, 3–10 × 1–2 cm;

segments oblong, somewhat oblique, entire;

proximal pair of veins from adjacent segments meeting margin above sinus.

18–25 pairs, 2–5(–8) × 1–1.5(–2) cm, deeply serrate to incised nearly 3/4 of width, distal pinnae often strongly adnate;

segments of rather harsh texture, somewhat oblique, rounded-deltate to often acute;

proximal pair of veins from adjacent segments united below sinus with excurrent vein.

round, medial;

indusia tan, often glandular;

sporangia glabrous.

round, medial to supramedial;

indusia tan, densely stellate-hairy;

sporangia glabrous.

abaxially of sparsely set hairs 0.2–0.4 mm primarily on costae, also of yellowish short-stalked glands less than 0.1 mm, blade tissue with numerous reddish to orangish, resinous, shiny, sessile, hemispheric glands;

blades adaxially with scattered hairs on veins.

on both surfaces of numerous, sessile or short-stalked, stellate hairs 0.1–0.2 mm on costae, veins, and blade tissue;

rachises and costae sometimes with longer simple hairs to 0.8 mm abaxially.

= 128.

= 144.